PIX 501 Flashing Port Light?

Hi trying to install a new PC at a clients. They have one PC with a statically assigned IP address. This PC can connect just fine. I Put the new PC in place and configured the IP address statically, making sure the information was the same as the other PC minus giving it a new IP address. The new PC does not connect and the connection says disconected. I have tried 3 different physical wires, and tried a USB NIC, with the same results. The port on the PIX blinks steadily on and off at a slow rate...anyone know what this signifies? It stays like that for several minutes then becomes solid like normal, but the PC cannot ping beyond it's self. This is the second location this has occured.

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